/**
 *
 * @desc   现金额转大写
 * @param  {Number} n
 * @return {String}
 */
export function digitUppercase(n) {
  var fraction = ["角", "分"];
  var digit = ["零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"];
  var unit = [
    ["元", "万", "亿"],
    ["", "拾", "佰", "仟"],
  ];
  var head = n < 0 ? "欠" : "";
  n = Math.abs(n);
  var s = "";
  for (var i = 0; i < fraction.length; i++) {
    s += (
      digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]
    ).replace(/零./, "");
  }
  s = s || "整";
  n = Math.floor(n);
  for (var i = 0; i < unit[0].length && n > 0; i++) {
    var p = "";
    for (var j = 0; j < unit[1].length && n > 0; j++) {
      p = digit[n % 10] + unit[1][j] + p;
      n = Math.floor(n / 10);
    }
    s = p.replace(/(零.)*零$/, "").replace(/^$/, "零") + unit[0][i] + s;
  }
  return (
    head +
    s
      .replace(/(零.)*零元/, "元")
      .replace(/(零.)+/g, "零")
      .replace(/^整$/, "零元整")
  );
}

/**
 *
 * @desc 随机生成颜色
 * @return {String}
 */
export function randomColor() {
  return (
    "#" + ("00000" + ((Math.random() * 0x1000000) << 0).toString(16)).slice(-6)
  );
}

/**
 *
 * @desc 生成指定范围[min, max]的随机数
 * @param  {Number} min
 * @param  {Number} max
 * @return {Number}
 */
export function randomNum(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min + 1)) + min;
}
